Littelfuse PGR-6100 SERIES Catalog Page

Protection Relays & Controls

Motor Protection–Basic (PGR 6000 Family)

PGR-6100 SERIES (GFR4000)

Ground-Fault & Insulation Monitor

Simplified Circuit Diagram

A

A

GROUNDED

SUPPLY

B

C

L1

L2

Ordering Information

ORDERING NUMBER CONTROL POWER

PGR-6100-120 120 Vac

PGR-6100-240

ACCESSORIES REQUIREMENT

PGC-5000 Series Required

PGH Family Required >1300 V

PGA-0500 Optional

PGA-0510 Optional

Note (1) - PGR- 6100-24 0 ordering option is not UL Listed.

For optional conformal coating pl ease consult factory.

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240 Vac

CT

D

PGR-6100 SERIES

(Ground-Fault
& Insulation Monitor)

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Description

The PGR-6100 combines the features of a ground-fault
protection relay and insulation monitor into one unit.
It protects against ground faults by monitoring insulation
resistance when the motor is de-energized and by
monitoring ground-fault current when the motor is energized.
The PGR-6100 features two separate analog outputs for
optional current and ohm meters, and two separate alarm
relays. It operates on one- or three-phase solidly grounded,
resistance grounded and ungrounded systems up to 6 kV.

Features & Benefits

FEATURES BENEFITS

Adjustable GF pickup
(10 mA - 3 A)

Adjustable insulation
pickup (250 kΩ - 2 MΩ)

Adjustable time delay
(50 ms - 1.0 s)

Output contacts

Analog outputs
(0 - 1 mA)

CT-Loop monitoring Alarms when CT is not connected

Selectable contact
operating mode

Trip setting provides a wide range of low-level
protection and system coordination

Customizable insulation resistance setpoints
for maximum protection

Adjustable trip delay for quick protection and
system coordination

Two Form C output contacts for ground fault and
insulation-resistance fault

Two analog outputs indicate insulation
resistance and ground-fault current

Selectable fail-safe or non-fail-safe operating
modes allows connection to shunt or
undervoltage breaker coil

Accessories

A

B

C

D

PGC-5000 Series Ground-Fault Transformers

Required zero-sequence current transformer
specifically designed for low level detection. Flux
conditioner is included to prevent saturation.

PGA-0500 Analog % Current Meter
PGA-0510 Analog Ohm Meter

Optional panel-mounted meters display
ground-fault current as a percentage of the
set-point and insulation resistance.

PGH Family High Tension Couplers

Required (for systems >1,300 V) PGH Family
high-tension coupler must be connected between
the phase conductor and the PGR-6100.

Specifications

IEEE Device Numbers Ground Fault (50G/N, 51G/N),
Ground detector (64), Alarm Relay (74)

Input Voltage See ordering information
Dimensions H 75 mm (3”); W 100 mm (3.9”); D 115 mm (4.5”)
Response delay < 250 ms
Contact Operating Mode Selectable fail-safe or non-fail-safe
Harmonic Filtering Standard feature
Test Button Standard feature
Reset Button Standard feature
CT-Loop Monitoring Standard feature
Output Contacts Two Form C
Analog Output 0-1 m A
Approvals UL Listed (E183688)
Warranty 5 years
Mounting DIN, Surface

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